Page 73 - HOLE MAKING CATALOG p001-148
P. 73
Indication of Drill Head Wear USER GUIDE INDEXABLE DRILLS
Wear Limit Vibration Noise Drastically Increases
0.2-0.3
Power Restriction
P(1) Px1.25(2)
Drilling Limitations
0
(1) New drilling head Surface Finish Declines
(2) Worn-out drilling head
Ra
Diameter Change
Ø > D nominal + 0.15 mm
D nominal
Ø < D nominal - 0.03 mm
71
